Balance Sheet Components - Property, Plant and Equipment - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Jul. 31, 2021	Aug. 01, 2020	May 01, 2021
Property Plant And Equipment [Line Items]
Depreciation	$ 7.8	$ 7.4
Capital expenditures recorded in accounts payable	$ 2.5		$ 5.5
Minimum | Buildings and Building Improvements
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Minimum | Machinery and Equipment
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Maximum | Buildings and Building Improvements
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life	40 years
Maximum | Machinery and Equipment
Property Plant And Equipment [Line Items]
Property, plant and equipment, useful life	15 years